Adding Fractions with Unlike Denominators
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Subject Area: Mathematics (B.E.S.T.) | Grade Level: 5
Lesson Length: 30 minutes
Keywords/Tags: Adding Fractions
Lesson Description: Standard: 5.NR.3.3 Model and solve problems involving addition and subtraction of fractions and mixed numbers with unlike denominators. Lesson Outcomes: In this lesson, students will learn and practice how to add fractions with unlike denominators. The attached video that students will first watch includes mathematical vocabulary and steps on how to Add Fractions with Unlike Denominators. Students will be presented with 4 steps: find a common denominator, rename the fractions, add, and simplify. After watching the video, students will complete a 10 question quiz. The quiz will challenge students to consider the steps to adding fractions with unlike denominators and solving problems based on the information from the video. After the students have completed the quiz, 3 additional resources will be provided for students to continue learning and practicing. The first resource is a video that will provide more instruction for students who may need it. The instructions also challenge students to listen for any new information. The second resource is a game that will support students by providing visuals when adding fractions with unlike denominators. The third resource is a game that will challenge students with mixed number answers. At the end of this lesson, students are expected to recall the 4 steps to adding fractions with unlike denominators and solve problems.

  • Other 5.NR.3.3 Model and solve problems involving addition and subtraction of fractions and mixed numbers with unlike denominators.
Video : Adding Fractions with Unlike Denominators - Math with Mr. J
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content.
Quiz : Adding Fractions with Unlike Denominators
Instructions: Please complete this quiz by choosing the correct answer for each question. You can take this quiz as many times needed.
Question #1
There are 6 steps to help you solve adding fractions with unlike denominators problems.
Question #2
The first step to adding fractions with unlike denominators is to find a common denominator?
Question #3
In order to find a common denominator, you have to identify the Least Common Multiple.
Question #4

What is the Least Common Multiple for the problem below?

1/3 + 3/5 =

Question #5

2/3 + 1/4 =

Question #6

1/3 + 2/12 =

Question #7

1/3 + 7/12 =

Question #8

Remember Step 4!

3/4 + 1/12 =

Question #9

1/6 + 1/12 =

Question #10
Using any information from the video, explain how to solve adding fractions with unlike denominators. Where do you start? What do you do next? What do you do last? 
Resources : Adding Fractions with Unlike Denominators
Instructions: Feel free to watch the videos and play the games to practice adding fractions with unlike denominators. You can also research any other games that we can use in class!
VIDEO: Adding Fractions with Unlike Denominators (Part 2) - Math with Mr. J
If you need any additional help, use this video to help you. If you already feel AWESOME at adding fractions with unlike denominators, watch the video and listen for any NEW details or information!
GAME: Adding Fractions with Unlike Denominators
Keep track of your score and show your teacher the next time you see them. If there are any problems that are challenging, write it down and plan to meet with your teacher. They are ready to help you!
GAME: Add Unlike Fractions
This game is a little more challenging, but you are still Adding Fractions with unlike denominators! You may see answers that look a little different. Remember, if you have any questions on a challenging problem, write it down and plan to meet with your teacher. They are ready to help you!